Google Hacking Database

The “Google Hacking Database” (GHDB) is a categorized index of Internet search engine queries designed to uncover interesting, and usually sensitive, information made publicly available on the Internet. In most cases, this information was never meant to be made public but due to any number of factors this information was linked in a web document that was crawled by a search engine which subsequently followed that link and indexed the sensitive information.

Background: About GHDB.